{"id":5177,"date":"2025-11-21T15:43:01","date_gmt":"2025-11-21T15:43:01","guid":{"rendered":"https:\/\/mehnatt.com\/?p=5177"},"modified":"2025-11-21T15:43:02","modified_gmt":"2025-11-21T15:43:02","slug":"mcqs-based-on-environment-11","status":"publish","type":"post","link":"https:\/\/mehnatt.com\/?p=5177","title":{"rendered":"MCQs Based On Environment &#8211; (11)"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Q1. Which factor does <strong>not<\/strong> directly affect the transparency of water in aquatic ecosystems?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Phytoplankton<\/li>\n\n\n\n<li style=\"font-size:17px\">Clay and silt<\/li>\n\n\n\n<li style=\"font-size:17px\">Salinity<\/li>\n\n\n\n<li style=\"font-size:17px\">Suspended particles<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 3. Salinity <br\/>\n<strong>Explanation:<\/strong> Salinity affects water chemistry but not transparency directly. Transparency is mainly affected by phytoplankton, silt, and suspended particles that block sunlight.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q2. What is the difference between oligotrophic and eutrophic lakes?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Eutrophic lakes are deeper<\/li>\n\n\n\n<li style=\"font-size:17px\">Oligotrophic lakes have high nutrient content<\/li>\n\n\n\n<li style=\"font-size:17px\">Eutrophic lakes have more plant and animal species<\/li>\n\n\n\n<li style=\"font-size:17px\">Oligotrophic lakes have better water quality<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 4. Oligotrophic lakes have better water quality <br\/>\n<strong>Explanation:<\/strong> Oligotrophic lakes are nutrient-poor, with clearer water and better quality for domestic and industrial use, while eutrophic lakes are nutrient-rich, supporting excessive plant growth and poor water quality.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q3. Cultural eutrophication is mainly caused by:<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Volcanic activity<\/li>\n\n\n\n<li style=\"font-size:17px\">Rainwater runoff<\/li>\n\n\n\n<li style=\"font-size:17px\">Agricultural runoff and sewage<\/li>\n\n\n\n<li style=\"font-size:17px\">Natural lake aging<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 3. Agricultural runoff and sewage <br\/>\n<strong>Explanation:<\/strong> Cultural eutrophication is human-induced and results from the inflow of nitrates and phosphates from fertilizers, sewage, etc., causing accelerated lake ageing and algal blooms.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q4. What happens during an algal bloom in a eutrophic lake?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Increased oxygen and fish population<\/li>\n\n\n\n<li style=\"font-size:17px\">Enhanced transparency<\/li>\n\n\n\n<li style=\"font-size:17px\">Reduced sunlight penetration and oxygen depletion<\/li>\n\n\n\n<li style=\"font-size:17px\">Increased nekton population<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 3. Reduced sunlight penetration and oxygen depletion <br\/>\n<strong>Explanation:<\/strong> An algal bloom blocks sunlight, reducing photosynthesis and leading to oxygen depletion as decomposers break down dead algae, killing aquatic life.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q5. Which of the following is the correct match for benthos?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Floating algae<\/li>\n\n\n\n<li style=\"font-size:17px\">Surface insects<\/li>\n\n\n\n<li style=\"font-size:17px\">Organisms attached to submerged plants<\/li>\n\n\n\n<li style=\"font-size:17px\">Organisms living at the bottom of water bodies<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 4. Organisms living at the bottom of water bodies <br\/>\n<strong>Explanation:<\/strong> Benthos includes organisms such as worms, crustaceans, and certain algae that live on or in the bottom of aquatic environments.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n","protected":false},"excerpt":{"rendered":"<p>Q1. Which factor does not directly affect the transparency of water in aquatic ecosystems? View Answer Correct Option: 3. Salinity Explanation: Salinity affects water chemistry but not transparency directly. Transparency is mainly affected by phytoplankton, silt, and suspended particles that block sunlight. Q2. What is the difference between oligotrophic and eutrophic lakes? View Answer Correct [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[19],"tags":[60,52,61,21,57,59,31,58,20],"class_list":["post-5177","post","type-post","status-publish","format-standard","hentry","category-environment","tag-algal-bloom","tag-aquatic-ecosystem","tag-benthos","tag-competitive-exams","tag-eutrophic-lakes","tag-eutrophication","tag-mcq","tag-oligotrophic-lakes","tag-ssc-cgl"],"_links":{"self":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5177"}],"version-history":[{"count":6,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5177\/revisions"}],"predecessor-version":[{"id":5183,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5177\/revisions\/5183"}],"wp:attachment":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}